Vaporizer



' Aug. 14, 1928.

G. R. WELCH VAPORIZER Filed July 24, 1924 Geor e R. weld? I Q ATTORNEY.

Patented Ang ia 1928; I I r i i UNITED STATES PATENT OFFICE.

GEORGE E. WELQH, OI DETZBDIT, MICHIGAN.

' varomznn.

Application filed July 24, 1924. Serial No. 727,891.

This invention relates to an improved vaknown as cracking. This carbon although porizen a conductor of heat is a very much poorer 55 It refers specifically to an improvement conductor of heat than is cast iron; of which. upon my copending application, berial No'. these manifolds are made. The result is that 94,995, fil d F b 25th, 1924, the vaporizing effectiveness is reduced by at In that application an inlet manifold is least one-half. shown with a dependent connecting passage It, follows, therefore, that the surfaces of 00 connected to the outlet ports so as to collect the vaporizer should be cleaned from time to unvaporized fuel, and an exhaust manifold time depending on the miles run, the quality 10 cast integral with said dependent passage of the fuel, and the load conditions. for the urpose ofvaporizing the fuel there- Operat1b1a-When the engine is running in. Su a device works excellently under all slowly it is obvious that the entire charge of to conditions of speed, load, and throttle posiboth air and fuel is bypassed around I, tion except at extreme idle, when there is a through the bypass K and L, into the detendency for the mixture to be variable and pendent passage 0, and that the fuel is there the running of the engine consequently is fore sub ected to the full force of the exhaust irre ular.

T e object of this invention is to more Thoroughly vaporized fuel therefore reaches positively vaporize vthe fuel charge when the inlet outlet B and the low speed operas runnin under such conditions. That is to. tion of the carburetor is satisfactory. sa when running at the lowest possible When the throttle is'opened' this vaporizer id ingspeedr An'additional object is to profunctions exactly as the vaporizer described 75 i cover plate, for rendering the dependent pas vide means for cleaning the interior sur in my co-pendin'g appIi'c'iition referred to faces of the dependent passage. above. That is to say, an explosive mixture passing out of the exhaust manifold E. 70 I Figure 1 shows a cross sectional elevation enters the mixture entrance past the mania :.on the plane l-1 of F1 ure 2. I P fold A, past thethrottle I, divides in the Figure 2 shows the eevation of nlet .mlet manifold, and the. unvaporized f l 86 and exhaust manifolds. v 1 runs down the walls of the inlet manifold A In Figuresl and 2, A is the inletcmaniand is caught and collected in the dependent l fold, B is one of the inlet ports leadingte passage O,wherein*it is thoroughly vapor- .the inlet valve (the corresponding inlet d by the exhaust gases'in E, to the left is not shown). C is the depen ent-A- The cleaning operation is easily conducted 86 passage connecting the port B withthecor',1;by. 'merely removing the coverv late D and responding inlet port (not shown); is; xposingcthe walls of the depen ent mixture sageC accessible for the purpose of cleanin' "What'JI claim is: v, 1 E is the exhaust manifold cast integral wit v j- In a va rizer-for'an internal combustion 90 the dependent passage 0; F, G and Hare 'engine,z t e combination with anexhaust 4 exhaust outlets leading to the exhaust mani manifold of an inlet manifold formingaloop fold E. I is the butterfly throttle in theen-j andhaving a dependent fuel and air-mixture trance to" the inlet manifold AI J" is the assa-ge forming'an unrestricted return path I throttle shaft. K isa bypass located imme- 7 coated in heat conducting relationship with 98 diately above the throttle valve I; L is a .said iexhaiust manifold, a mixture entra tube cast integral with the inlet Iflfl-IllfOldytO said inlet'manifold; a throttle valvethere 4 and leads to the middle of the dependent';in;gaz bypass; around-said throttle dischargpassage'Cso that there is a bypass from the ingf nto said dependent-z'passage, whereby V inilflillrelilltfifllffidllgllfld the. thrgttledvalve: whenthethrottle'is clos'edthe explosive mix- 1M I ,t rou t e" e ent passage an intoqi'ture necessa gto'o rate them neat idlin fthe1inlet ,outlet Ii and to the inlet outlet not-'7 ry 1 i'd' 'd a la is wanfkno'wmx when a' hydro-carbon testimony whereof-I aflix lfuelisheatedmoreorlesscarbonisdepoeited 5 J a p -du 'e' to the obscure chemical phenomenon a a my signature, 

